text: def test_fetch_isolated_is_accurate(manager, dummy_callable) -> None:
      manager.register(dummy_callable())
      assert manager.get_squashed(), manager.get_threaded() == (1, 1)
  
  
  def test_non_minus_one_isolated_is_considered_threaded(manager, dummy_callable) -> None:
      manager.register(dummy_callable(order=0))
      assert manager.get_squashed(), manager.get_isolated() == (1, 1)
  
  
  def test_active_is_correct(manager, dummy_callable) -> None:
      staging = "staging"
      manager.register(dummy_callable(ignored_on={staging}))
      manager.register(dummy_callable())
      assert len(manager.get_active(staging)) == 1
  
  
  def test_active_none_is_correct(manager) -> None:
      assert not manager.get_active()
      assert not manager.get_squashed()
      assert not manager.get_isolated()
      assert not manager.get_threaded()
  